581 lines
23 KiB
Plaintext
581 lines
23 KiB
Plaintext
%{
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package main
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import (
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"bytes"
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"fmt"
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"os"
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"io"
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)
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type node struct {
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name string
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children []node
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attributes map[string]string
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}
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func (n node) String() string {
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buf := new(bytes.Buffer)
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n.print(buf, " ")
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return buf.String()
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}
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func (n node) print(out io.Writer, indent string) {
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if (len(n.attributes) > 0) {
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fmt.Fprintf(out, "\n%v%v %s", indent, n.name, n.attributes)
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} else {
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fmt.Fprintf(out, "\n%v%v", indent, n.name)
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}
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for _, nn := range n.children {
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nn.print(out, indent + " ")
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}
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}
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func Node(name string) node {
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return node{name: name, attributes: make(map[string]string)}
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}
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func (n node) append(nn...node) node {
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n.children = append(n.children, nn...)
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return n
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}
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func (n node) attribute(key string, value string) node {
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n.attributes[key] = value
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return n
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}
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%}
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%union{
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node node
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token string
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value string
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}
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%left T_INCLUDE T_INCLUDE_ONCE T_EVAL T_REQUIRE T_REQUIRE_ONCE
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%left ','
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%left T_LOGICAL_OR
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%left T_LOGICAL_XOR
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%left T_LOGICAL_AND
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%right T_PRINT
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%right T_YIELD
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%right T_DOUBLE_ARROW
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%right T_YIELD_FROM
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%left '=' T_PLUS_EQUAL T_MINUS_EQUAL T_MUL_EQUAL T_DIV_EQUAL T_CONCAT_EQUAL T_MOD_EQUAL T_AND_EQUAL T_OR_EQUAL T_XOR_EQUAL T_SL_EQUAL T_SR_EQUAL T_POW_EQUAL
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%left '?' ':'
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%right T_COALESCE
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%left T_BOOLEAN_OR
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%left T_BOOLEAN_AND
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%left '|'
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%left '^'
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%left '&'
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%nonassoc T_IS_EQUAL T_IS_NOT_EQUAL T_IS_IDENTICAL T_IS_NOT_IDENTICAL T_SPACESHIP
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%nonassoc '<' T_IS_SMALLER_OR_EQUAL '>' T_IS_GREATER_OR_EQUAL
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%left T_SL T_SR
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%left '+' '-' '.'
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%left '*' '/' '%'
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%right '!'
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%nonassoc T_INSTANCEOF
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%right '~' T_INC T_DEC T_INT_CAST T_DOUBLE_CAST T_STRING_CAST T_ARRAY_CAST T_OBJECT_CAST T_BOOL_CAST T_UNSET_CAST '@'
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%right T_POW
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%right '['
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%nonassoc T_NEW T_CLONE
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%left T_NOELSE
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%left T_ELSEIF
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%left T_ELSE
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%left T_ENDIF
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%right T_STATIC T_ABSTRACT T_FINAL T_PRIVATE T_PROTECTED T_PUBLIC
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%type <token> $unk
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%token <token> T_INCLUDE
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%token <token> T_INCLUDE_ONCE
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%token <token> T_EXIT
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%token <token> T_IF
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%token <token> T_LNUMBER
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%token <token> T_DNUMBER
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%token <token> T_STRING
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%token <token> T_STRING_VARNAME
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%token <token> T_VARIABLE
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%token <token> T_NUM_STRING
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%token <token> T_INLINE_HTML
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%token <token> T_CHARACTER
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%token <token> T_BAD_CHARACTER
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%token <token> T_ENCAPSED_AND_WHITESPACE
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%token <token> T_CONSTANT_ENCAPSED_STRING
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%token <token> T_ECHO
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%token <token> T_DO
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%token <token> T_WHILE
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%token <token> T_ENDWHILE
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%token <token> T_FOR
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%token <token> T_ENDFOR
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%token <token> T_FOREACH
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%token <token> T_ENDFOREACH
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%token <token> T_DECLARE
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%token <token> T_ENDDECLARE
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%token <token> T_AS
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%token <token> T_SWITCH
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%token <token> T_ENDSWITCH
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%token <token> T_CASE
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%token <token> T_DEFAULT
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%token <token> T_BREAK
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%token <token> T_CONTINUE
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%token <token> T_GOTO
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%token <token> T_FUNCTION
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%token <token> T_CONST
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%token <token> T_RETURN
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%token <token> T_TRY
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%token <token> T_CATCH
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%token <token> T_FINALLY
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%token <token> T_THROW
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%token <token> T_USE
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%token <token> T_INSTEADOF
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%token <token> T_GLOBAL
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%token <token> T_VAR
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%token <token> T_UNSET
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%token <token> T_ISSET
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%token <token> T_EMPTY
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%token <token> T_HALT_COMPILER
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%token <token> T_CLASS
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%token <token> T_TRAIT
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%token <token> T_INTERFACE
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%token <token> T_EXTENDS
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%token <token> T_IMPLEMENTS
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%token <token> T_OBJECT_OPERATOR
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%token <token> T_DOUBLE_ARROW
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%token <token> T_LIST
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%token <token> T_ARRAY
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%token <token> T_CALLABLE
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%token <token> T_CLASS_C
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%token <token> T_TRAIT_C
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%token <token> T_METHOD_C
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%token <token> T_FUNC_C
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%token <token> T_LINE
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%token <token> T_FILE
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%token <token> T_COMMENT
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%token <token> T_DOC_COMMENT
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%token <token> T_OPEN_TAG
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%token <token> T_OPEN_TAG_WITH_ECHO
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%token <token> T_CLOSE_TAG
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%token <token> T_WHITESPACE
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%token <token> T_START_HEREDOC
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%token <token> T_END_HEREDOC
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%token <token> T_DOLLAR_OPEN_CURLY_BRACES
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%token <token> T_CURLY_OPEN
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%token <token> T_PAAMAYIM_NEKUDOTAYIM
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%token <token> T_NAMESPACE
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%token <token> T_NS_C
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%token <token> T_DIR
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%token <token> T_NS_SEPARATOR
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%token <token> T_ELLIPSIS
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%type <value> class_modifier
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%type <value> is_reference
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%type <value> is_variadic
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%type <value> returns_ref
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%type <node> identifier
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%type <node> top_statement
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%type <node> namespace_name
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%type <node> namespace_name_parts
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%type <node> name
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%type <node> top_statement_list
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%type <node> statement
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%type <node> inner_statement
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%type <node> inner_statement_list
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%type <node> class_modifiers
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%type <node> class_declaration_statement
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%type <node> function_declaration_statement
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%type <node> optional_type
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%type <node> return_type
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%type <node> type_expr
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%type <node> type
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%type <node> parameter_list
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%type <node> non_empty_parameter_list
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%type <node> parameter
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%type <node> expr
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%type <node> expr_without_variable
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%type <node> callable_variable
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%type <node> variable
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%type <node> simple_variable
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%type <node> if_stmt_without_else
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%type <node> if_stmt
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%type <node> alt_if_stmt_without_else
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%type <node> alt_if_stmt
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%type <node> while_statement
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%type <node> for_exprs
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%type <node> non_empty_for_exprs
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%type <node> for_statement
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%type <node> switch_case_list
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%type <node> case_list
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%%
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/////////////////////////////////////////////////////////////////////////
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start:
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top_statement_list { fmt.Println($1) }
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;
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reserved_non_modifiers:
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T_INCLUDE | T_INCLUDE_ONCE | T_EVAL | T_REQUIRE | T_REQUIRE_ONCE | T_LOGICAL_OR | T_LOGICAL_XOR | T_LOGICAL_AND
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| T_INSTANCEOF | T_NEW | T_CLONE | T_EXIT | T_IF | T_ELSEIF | T_ELSE | T_ENDIF | T_ECHO | T_DO | T_WHILE | T_ENDWHILE
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| T_FOR | T_ENDFOR | T_FOREACH | T_ENDFOREACH | T_DECLARE | T_ENDDECLARE | T_AS | T_TRY | T_CATCH | T_FINALLY
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| T_THROW | T_USE | T_INSTEADOF | T_GLOBAL | T_VAR | T_UNSET | T_ISSET | T_EMPTY | T_CONTINUE | T_GOTO
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| T_FUNCTION | T_CONST | T_RETURN | T_PRINT | T_YIELD | T_LIST | T_SWITCH | T_ENDSWITCH | T_CASE | T_DEFAULT | T_BREAK
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| T_ARRAY | T_CALLABLE | T_EXTENDS | T_IMPLEMENTS | T_NAMESPACE | T_TRAIT | T_INTERFACE | T_CLASS
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| T_CLASS_C | T_TRAIT_C | T_FUNC_C | T_METHOD_C | T_LINE | T_FILE | T_DIR | T_NS_C
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;
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semi_reserved:
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reserved_non_modifiers
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| T_STATIC | T_ABSTRACT | T_FINAL | T_PRIVATE | T_PROTECTED | T_PUBLIC
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;
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identifier:
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T_STRING { $$ = Node("identifier") }
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| semi_reserved { $$ = Node("reserved") }
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;
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namespace_name_parts:
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T_STRING { $$ = Node("NamespaceParts").append(Node($1)) }
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| namespace_name_parts T_NS_SEPARATOR T_STRING { $$ = $1.append(Node($3)) }
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;
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namespace_name:
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namespace_name_parts { $$ = $1; }
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;
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name:
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namespace_name { $$ = Node("Name").append($1); }
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| T_NS_SEPARATOR namespace_name { $$ = Node("Name").append($2).attribute("FullyQualified", "true"); }
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| T_NAMESPACE T_NS_SEPARATOR namespace_name { $$ = Node("Name").append($3).attribute("Relative", "true"); }
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;
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top_statement_list:
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top_statement_list top_statement { $$ = $1.append($2); }
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| /* empty */ { $$ = Node("Statements") }
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;
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top_statement:
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statement { $$ = $1 }
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| function_declaration_statement { $$ = $1 }
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| T_INCLUDE identifier ';' { $$ = $2; /*TODO: identifier stub, refactor it*/ }
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| T_NAMESPACE namespace_name ';' { $$ = Node("Namespace").append($2); }
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| class_declaration_statement { $$ = $1; }
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;
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inner_statement_list:
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inner_statement_list inner_statement { $$ = $1.append($2); }
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| /* empty */ { $$ = Node("statement_list") }
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;
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inner_statement:
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statement { $$ = $1; }
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| function_declaration_statement { $$ = $1; }
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| class_declaration_statement { $$ = $1; }
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statement:
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'{' inner_statement_list '}' { $$ = $2; }
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| if_stmt { $$ = $1; }
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| alt_if_stmt { $$ = $1; }
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| T_WHILE '(' expr ')' while_statement { $$ = Node("While").append(Node("expr").append($3)).append(Node("stmt").append($5)); }
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| T_DO statement T_WHILE '(' expr ')' ';' { $$ = Node("DoWhile").append(Node("expr").append($5)).append(Node("stmt").append($2)); }
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| T_FOR '(' for_exprs ';' for_exprs ';' for_exprs ')' for_statement
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{
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$$ = Node("For").
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append(Node("expr1").append($3)).
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append(Node("expr2").append($5)).
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append(Node("expr3").append($7)).
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append(Node("stmt").append($9))
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}
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| T_SWITCH '(' expr ')' switch_case_list { $$ = Node("Switch").append(Node("expr").append($3)).append($5); }
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| expr ';' { $$ = $1; }
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if_stmt_without_else:
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T_IF '(' expr ')' statement
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{
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$$ = Node("If").append(Node("expr").append($3)).append(Node("stmt").append($5))
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}
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| if_stmt_without_else T_ELSEIF '(' expr ')' statement
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{
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$$ = $1.append(Node("ElseIf").append(Node("expr").append($4)).append(Node("stmt").append($6)))
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}
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;
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if_stmt:
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if_stmt_without_else %prec T_NOELSE { $$ = $1; }
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| if_stmt_without_else T_ELSE statement
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{
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$$ = $1.append(Node("Else").append(Node("stmt").append($3)))
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}
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;
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alt_if_stmt_without_else:
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T_IF '(' expr ')' ':' inner_statement_list
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{
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$$ = Node("AltIf").append(Node("expr").append($3)).append(Node("stmt").append($6))
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}
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| alt_if_stmt_without_else T_ELSEIF '(' expr ')' ':' inner_statement_list
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{
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$$ = $1.append(Node("AltElseIf").append(Node("expr").append($4)).append(Node("stmt").append($7)))
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}
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;
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alt_if_stmt:
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alt_if_stmt_without_else T_ENDIF ';' { $$ = $1; }
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| alt_if_stmt_without_else T_ELSE ':' inner_statement_list T_ENDIF ';'
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{
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$$ = $1.append(Node("AltElse").append(Node("stmt").append($4)))
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}
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;
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while_statement:
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statement { $$ = $1; }
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| ':' inner_statement_list T_ENDWHILE ';' { $$ = $2; }
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;
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for_exprs:
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/* empty */ { $$ = Node("null"); }
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| non_empty_for_exprs { $$ = $1; }
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;
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non_empty_for_exprs:
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non_empty_for_exprs ',' expr { $$ = $1.append($3) }
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| expr { $$ = Node("ExpressionList").append($1) }
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;
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switch_case_list:
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'{' case_list '}' { $$ = $2; }
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| '{' ';' case_list '}' { $$ = $3; }
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| ':' case_list T_ENDSWITCH ';' { $$ = $2; }
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| ':' ';' case_list T_ENDSWITCH ';' { $$ = $3; }
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;
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case_list:
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/* empty */ { $$ = Node("CaseList") }
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| case_list T_CASE expr case_separator inner_statement_list
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{
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$$ = $1.append(Node("Case").append(Node("expr").append($3)).append(Node("stmt").append($5)))
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}
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| case_list T_DEFAULT case_separator inner_statement_list
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{
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$$ = $1.append(Node("Default").append(Node("stmt").append($4)))
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}
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;
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case_separator:
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':'
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| ';'
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;
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for_statement:
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statement { $$ = $1; }
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| ':' inner_statement_list T_ENDFOR ';' { $$ = $2; }
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;
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class_declaration_statement:
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class_modifiers T_CLASS T_STRING '{' '}' { $$ = $1.attribute("name", $3) }
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| T_CLASS T_STRING '{' '}' { $$ = Node("Class").attribute("name", $2) }
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;
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class_modifiers:
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class_modifier { $$ = Node("Class").attribute($1, "true") }
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| class_modifiers class_modifier { $$ = $1.attribute($2, "true") }
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;
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class_modifier:
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T_ABSTRACT { $$ = "abstract" }
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| T_FINAL { $$ = "final" }
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;
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function_declaration_statement:
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T_FUNCTION returns_ref T_STRING '(' parameter_list ')' return_type '{' inner_statement_list '}'
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{
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$$ = Node("Function").
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attribute("name", $3).
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attribute("returns_ref", $2).
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append($5).
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append($7).
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append($9);
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}
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;
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parameter_list:
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non_empty_parameter_list { $$ = $1; }
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| /* empty */ { $$ = Node("Parameter list"); }
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;
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non_empty_parameter_list:
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parameter { $$ = Node("Parameter list").append($1) }
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| non_empty_parameter_list ',' parameter { $$ = $1.append($3); }
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;
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parameter:
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optional_type is_reference is_variadic T_VARIABLE
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{
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$$ = Node("Parameter").
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append($1).
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attribute("is_reference", $2).
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attribute("is_variadic", $3).
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attribute("var", $4);
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}
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| optional_type is_reference is_variadic T_VARIABLE '=' expr
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{
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$$ = Node("Parameter").
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append($1).
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attribute("is_reference", $2).
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attribute("is_variadic", $3).
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attribute("var", $4).
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append($6);
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}
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;
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optional_type:
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/* empty */ { $$ = Node("No type") }
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| type_expr { $$ = $1; }
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;
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returns_ref:
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/* empty */ { $$ = "false"; }
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| '&' { $$ = "true"; }
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;
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is_reference:
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/* empty */ { $$ = "false"; }
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| '&' { $$ = "true"; }
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;
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is_variadic:
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/* empty */ { $$ = "false"; }
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| T_ELLIPSIS { $$ = "true"; }
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;
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type_expr:
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type { $$ = $1; }
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| '?' type { $$ = $2; $$.attribute("nullable", "true") }
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;
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type:
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name { $$ = $1; }
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| T_ARRAY { $$ = Node("array type"); }
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|
| T_CALLABLE { $$ = Node("callable type"); }
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;
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return_type:
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/* empty */ { $$ = Node("void"); }
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|
| ':' type_expr { $$ = $2; }
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;
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expr_without_variable:
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variable '=' expr { $$ = Node("Assign").append($1).append($3); }
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|
| variable '=' '&' expr { $$ = Node("AssignRef").append($1).append($4); }
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| variable '=' '&' expr { $$ = Node("AssignRef").append($1).append($4); }
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| T_CLONE expr { $$ = Node("Clone").append($2); }
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| variable T_PLUS_EQUAL expr { $$ = Node("AssignAdd").append($1).append($3); }
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|
| variable T_MINUS_EQUAL expr { $$ = Node("AssignSub").append($1).append($3); }
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| variable T_MUL_EQUAL expr { $$ = Node("AssignMul").append($1).append($3); }
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|
| variable T_POW_EQUAL expr { $$ = Node("AssignPow").append($1).append($3); }
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| variable T_DIV_EQUAL expr { $$ = Node("AssignDiv").append($1).append($3); }
|
|
| variable T_CONCAT_EQUAL expr { $$ = Node("AssignConcat").append($1).append($3); }
|
|
| variable T_MOD_EQUAL expr { $$ = Node("AssignMod").append($1).append($3); }
|
|
| variable T_AND_EQUAL expr { $$ = Node("AssignAnd").append($1).append($3); }
|
|
| variable T_AND_EQUAL expr { $$ = Node("AssignAnd").append($1).append($3); }
|
|
| variable T_OR_EQUAL expr { $$ = Node("AssignOr").append($1).append($3); }
|
|
| variable T_XOR_EQUAL expr { $$ = Node("AssignXor").append($1).append($3); }
|
|
| variable T_SL_EQUAL expr { $$ = Node("AssignShiftLeft").append($1).append($3); }
|
|
| variable T_SR_EQUAL expr { $$ = Node("AssignShiftRight").append($1).append($3); }
|
|
| variable T_INC { $$ = Node("PostIncrement").append($1) }
|
|
| T_INC variable { $$ = Node("PreIncrement").append($2) }
|
|
| variable T_DEC { $$ = Node("PostDecrement").append($1) }
|
|
| T_DEC variable { $$ = Node("PreDecrement").append($2) }
|
|
| expr T_BOOLEAN_OR expr { $$ = Node("Or").append($1).append($3) }
|
|
| expr T_BOOLEAN_AND expr { $$ = Node("And").append($1).append($3) }
|
|
| expr T_LOGICAL_OR expr { $$ = Node("Or").append($1).append($3) }
|
|
| expr T_LOGICAL_AND expr { $$ = Node("And").append($1).append($3) }
|
|
| expr T_LOGICAL_XOR expr { $$ = Node("Xor").append($1).append($3) }
|
|
| expr '|' expr { $$ = Node("BitwiseOr").append($1).append($3) }
|
|
| expr '&' expr { $$ = Node("BitwiseAnd").append($1).append($3) }
|
|
| expr '^' expr { $$ = Node("BitwiseXor").append($1).append($3) }
|
|
| expr '.' expr { $$ = Node("Concat").append($1).append($3) }
|
|
| expr '+' expr { $$ = Node("Add").append($1).append($3) }
|
|
| expr '-' expr { $$ = Node("Sub").append($1).append($3) }
|
|
| expr '*' expr { $$ = Node("Mul").append($1).append($3) }
|
|
| expr T_POW expr { $$ = Node("Pow").append($1).append($3) }
|
|
| expr '/' expr { $$ = Node("Div").append($1).append($3) }
|
|
| expr '%' expr { $$ = Node("Mod").append($1).append($3) }
|
|
| expr T_SL expr { $$ = Node("ShiftLeft").append($1).append($3) }
|
|
| expr T_SR expr { $$ = Node("ShiftRight").append($1).append($3) }
|
|
| '+' expr %prec T_INC { $$ = Node("UnaryPlus").append($2) }
|
|
| '-' expr %prec T_INC { $$ = Node("UnaryMinus").append($2) }
|
|
| '!' expr { $$ = Node("BooleanNot").append($2) }
|
|
| '~' expr { $$ = Node("BitwiseNot").append($2) }
|
|
| expr T_IS_IDENTICAL expr { $$ = Node("Identical").append($1).append($3) }
|
|
| expr T_IS_NOT_IDENTICAL expr { $$ = Node("NotIdentical").append($1).append($3) }
|
|
| expr T_IS_EQUAL expr { $$ = Node("Equal").append($1).append($3) }
|
|
| expr T_IS_NOT_EQUAL expr { $$ = Node("NotEqual").append($1).append($3) }
|
|
| expr T_SPACESHIP expr { $$ = Node("Spaceship").append($1).append($3) }
|
|
| expr '<' expr { $$ = Node("Smaller").append($1).append($3) }
|
|
| expr T_IS_SMALLER_OR_EQUAL expr { $$ = Node("SmallerOrEqual").append($1).append($3) }
|
|
| expr '>' expr { $$ = Node("Greater").append($1).append($3) }
|
|
| expr T_IS_GREATER_OR_EQUAL expr { $$ = Node("GreaterOrEqual").append($1).append($3) }
|
|
| '(' expr ')' { $$ = $2; }
|
|
| expr '?' expr ':' expr { $$ = Node("Ternary").append($1).append($3).append($5); }
|
|
| expr '?' ':' expr { $$ = Node("Ternary").append($1).append($4); }
|
|
| expr T_COALESCE expr { $$ = Node("Coalesce").append($1).append($3); }
|
|
| T_EMPTY '(' expr ')' { $$ = Node("Empty").append($3); }
|
|
| T_INCLUDE expr { $$ = Node("Include").append($2); }
|
|
| T_INCLUDE_ONCE expr { $$ = Node("IncludeOnce").append($2); }
|
|
| T_EVAL '(' expr ')' { $$ = Node("Eval").append($3); }
|
|
| T_REQUIRE expr { $$ = Node("Require").append($2); }
|
|
| T_REQUIRE_ONCE expr { $$ = Node("RequireOnce").append($2); }
|
|
| T_INT_CAST expr { $$ = Node("CastInt").append($2); }
|
|
| T_DOUBLE_CAST expr { $$ = Node("CastDouble").append($2); }
|
|
| T_STRING_CAST expr { $$ = Node("CastString").append($2); }
|
|
| T_ARRAY_CAST expr { $$ = Node("CastArray").append($2); }
|
|
| T_OBJECT_CAST expr { $$ = Node("CastObject").append($2); }
|
|
| T_BOOL_CAST expr { $$ = Node("CastBool").append($2); }
|
|
| T_UNSET_CAST expr { $$ = Node("CastUnset").append($2); }
|
|
| '@' expr { $$ = Node("Silence").append($2); }
|
|
|
|
| T_PRINT expr { $$ = Node("Print").append($2); }
|
|
| T_YIELD { $$ = Node("Yield"); }
|
|
| T_YIELD expr { $$ = Node("Yield").append($2); }
|
|
| T_YIELD expr T_DOUBLE_ARROW expr { $$ = Node("Yield").append($2).append($4); }
|
|
| T_YIELD_FROM expr { $$ = Node("YieldFrom").append($2); }
|
|
;
|
|
|
|
expr:
|
|
variable { $$ = $1; }
|
|
| expr_without_variable { $$ = $1; }
|
|
;
|
|
|
|
callable_variable:
|
|
simple_variable { $$ = $1; }
|
|
;
|
|
|
|
variable:
|
|
callable_variable { $$ = $1; }
|
|
;
|
|
|
|
simple_variable:
|
|
T_VARIABLE { $$ = Node("Variable").attribute("name", $1); }
|
|
| '$' '{' expr '}' { $$ = $3; }
|
|
| '$' simple_variable { $$ = Node("Variable").append($2); }
|
|
;
|
|
|
|
/////////////////////////////////////////////////////////////////////////
|
|
|
|
%%
|
|
|
|
const src = `<?
|
|
|
|
switch($a) :;
|
|
case $b; $b = $a;
|
|
default; $a;
|
|
endswitch;
|
|
|
|
`
|
|
|
|
func main() {
|
|
yyDebug = 0
|
|
yyErrorVerbose = true
|
|
l := newLexer(bytes.NewBufferString(src), os.Stdout, "file.name")
|
|
yyParse(l)
|
|
} |