Parser class. More...

#include <parser.hpp>

Public Member Functions
	Parser (std::vector< Token > t, bool id)
std::vector< AST::StmtPtr >	parse ()
	Method for parsing tokens into AST tree.
void	reset ()
	Method for resetting all parameters in parser.

Private Member Functions
AST::StmtPtr	parse_stmt (bool from_for=false)
	Method for parsing only one statement.
AST::StmtPtr	parse_var_decl_stmt ()
	Method for parsing of variable declaration.
AST::StmtPtr	parse_var_asgn_stmt ()
	Method for parsing of variable assignment.
AST::StmtPtr	parse_func_decl_stmt ()
	Method for parsing of functions declaration.
AST::StmtPtr	parse_func_call_stmt ()
	Method for parsing of functions calling.
AST::Argument	parse_argument ()
	Method for parsing of function argument.
AST::StmtPtr	parse_return_stmt ()
	Method for parsing of 'return'.
AST::StmtPtr	parse_if_else_stmt ()
	Method for parsing of control flow operators (aka if-else).
AST::StmtPtr	parse_while_cycle_stmt ()
	Method for parsing of while cycle.
AST::StmtPtr	parse_do_while_cycle_stmt ()
	Method for parsing of do-while cycle.
AST::StmtPtr	parse_for_cycle_stmt ()
	Method for parsing of for cycle.
AST::StmtPtr	parse_break_stmt ()
	Method for parsing of break statement.
AST::StmtPtr	parse_continue_stmt ()
	Method for parsing of continue statement.
AST::StmtPtr	parse_module_stmt ()
	Method for parsing of module definition.
AST::StmtPtr	parse_use_module_stmt ()
	Method for parsing of import the module.
AST::StmtPtr	parse_func_decl_proto_stmt ()
	Method for parsing of functions prototypes.
AST::StmtPtr	parse_extern_stmt ()
	Method for parsing of declaration functions prototypes as extern.
AST::ExprPtr	parse_expr ()
	Method for parsing expressions.
AST::ExprPtr	parse_l_and_expr ()
	Method for parsing expression as 'logical and'.
AST::ExprPtr	parse_l_or_expr ()
	Method for parsing expression as 'logical or'.
AST::ExprPtr	parse_equality_expr ()
	Method for parsing expression as 'equality'.
AST::ExprPtr	parse_comparation_expr ()
	Method for parsing expression as 'comparation'.
AST::ExprPtr	parse_additive_expr ()
	Method for parsing expression as 'additive'.
AST::ExprPtr	parse_multiplicative_expr ()
	Method for parsing expression as 'multiplicative'.
AST::ExprPtr	parse_unary_expr ()
	Method for parsing expression as 'unary'.
AST::ExprPtr	parse_primary_expr ()
	Method for parsing expression as 'primary'.
AST::ExprPtr	parse_obj_chain_expr ()
	Method for parsing expresion as chain of objects.
Token	peek (int32_t rpos=0) const
	Method for getting token from tokens by parser pos and passed offset.
bool	match (TokenType type)
	Method for skipping the current token if its type is equal to the passed one.
Token	consume (TokenType type, std::string err_msg, uint32_t line)
	Method for verifying the type of the current token.
AST::Type	consume_type ()
	Method for verifyng the Topaz type by current tokens.
void	consume_semicolon ()
	Method for skipping semicolon in the end of statement.
AST::TypeValue	ttype_to_tvalue (TokenType type)
	Method for convert type of token to type of Topaz value.
bool	is_compound_asgn_operator (Token token)
	Method for checking whether the passed token is a compound assignment operator.
AST::ExprPtr	create_compound_asgn_operator (std::string var_name)
	Method for creating compound assignment operator and returns expression of assignment.
AST::ExprPtr	create_inc_dec_operator (std::string var_name)
	Method for creating increment/decrement operator and returns expression of assignment.

Private Attributes
std::vector< Token >	tokens
size_t	tokens_count
uint32_t	pos
bool	is_debug

Detailed Description

Parser class.

Definition at line 14 of file parser.hpp.

Constructor & Destructor Documentation

◆ Parser()

Parser::Parser	(	std::vector< Token >	t,
		bool	id )

inline

Definition at line 22 of file parser.hpp.

Member Function Documentation

◆ consume()

Token Parser::consume	(	TokenType	type,
		std::string	err_msg,
		uint32_t	line )

private

Method for verifying the type of the current token.

This method checks whether the type of the current token is equal to the passed type. If equal, it skips and returns it, otherwise it throws an exception with the passed message

Parameters

type	Type of token for verification
err_msg	Error message if verification is fault
line	Line coordinate. For exception

Returns: Verificated token

Definition at line 593 of file parser.cpp.

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◆ consume_semicolon()

void Parser::consume_semicolon ( )

private

Method for skipping semicolon in the end of statement.

This method checks the current token and if it is the semicolon, then skipping it, otherwise throwing exception

Definition at line 636 of file parser.cpp.

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◆ consume_type()

AST::Type Parser::consume_type ( )

private

Method for verifyng the Topaz type by current tokens.

This method checks the current keywords to collect the final Topaz type and returns it. If the tokens are in the wrong sequence or are not part of the type, an exception is thrown

Returns: Topaz type

Definition at line 601 of file parser.cpp.

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◆ create_compound_asgn_operator()

AST::ExprPtr Parser::create_compound_asgn_operator ( std::string var_name )

private

Method for creating compound assignment operator and returns expression of assignment.

This method checking current token and if it is compound assignment operator, then generating expression for assignment. For example 'a += 1' is equal 'a = a + 1' If current token isnt compound assignment operator, then throwing exception

Parameters

var_name Name of variable for assignment

Returns: Assingment expression

Definition at line 686 of file parser.cpp.

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◆ create_inc_dec_operator()

AST::ExprPtr Parser::create_inc_dec_operator ( std::string var_name )

private

Method for creating increment/decrement operator and returns expression of assignment.

This method checking current token and if it is increment/decrement operator, then generating expression of assignment. For example 'a++' is equal 'a = a + 1' If current token isnt increment/decrement operator, then throwing exception

Parameters

var_name Name of variable for assignment

Returns: Increment/Decrement expression

Definition at line 708 of file parser.cpp.

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◆ is_compound_asgn_operator()

bool Parser::is_compound_asgn_operator ( Token token )

private

Method for checking whether the passed token is a compound assignment operator.

This method checks whether the passed token is a compound assignment operator. If yes, it returns true, otherwise it returns false

Parameters

token Token for checking

Returns: True if token is compound assignment operator, and false otherwise

Definition at line 673 of file parser.cpp.

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◆ match()

bool Parser::match ( TokenType type )

private

Method for skipping the current token if its type is equal to the passed one.

If type of current token is equal to the passed type, then this token will be skipped and returns 'true'. Otherwise returns 'false'

Parameters

type	Type of token wich need to skip

Returns: 'true' if passed type is equal to type of current token and 'false' otherwise

Definition at line 585 of file parser.cpp.

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◆ parse()

std::vector< AST::StmtPtr > Parser::parse ( )

Method for parsing tokens into AST tree.

This method parsing all tokens, creates AST tree and returns it

Returns: AST tree

Definition at line 10 of file parser.cpp.

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◆ parse_additive_expr()

AST::ExprPtr Parser::parse_additive_expr ( )

private

Method for parsing expression as 'additive'.

This method parsing all expressions as 'additive'. If type of current token isnt TOK_OP_PLUS (aka +) or TOK_OP_MINUS (aka -), then returns created expression

Returns: Parsed expression as 'additive'

Definition at line 420 of file parser.cpp.

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◆ parse_argument()

AST::Argument Parser::parse_argument ( )

private

Method for parsing of function argument.

This method sets the syntax for defining a function argument, creates the AST element of the Argument and returns it

Returns: Argument

Definition at line 201 of file parser.cpp.

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◆ parse_break_stmt()

AST::StmtPtr Parser::parse_break_stmt ( )

private

Method for parsing of break statement.

This method sets the syntax for break statement, creates the AST element of the BreakStmt and returns it

Returns: BreakStmt

Definition at line 285 of file parser.cpp.

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◆ parse_comparation_expr()

AST::ExprPtr Parser::parse_comparation_expr ( )

private

Method for parsing expression as 'comparation'.

This method parsing all expressions as 'comparation'. If type of current token isnt TOK_OP_GT (aka >) or TOK_OP_GT_EQ (aka >=) or TOK_OP_LS (aka <) or TOK_OP_LS_EQ (aka <=), then returns created expression

Returns: Parsed expression as 'comparation'

Definition at line 397 of file parser.cpp.

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◆ parse_continue_stmt()

AST::StmtPtr Parser::parse_continue_stmt ( )

private

Method for parsing of continue statement.

This method sets the syntax for continue statement, creates the AST element of the ContinueStmt and returns it

Returns: ContinueStmt

Definition at line 290 of file parser.cpp.

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◆ parse_do_while_cycle_stmt()

AST::StmtPtr Parser::parse_do_while_cycle_stmt ( )

private

Method for parsing of do-while cycle.

This method sets the syntax for do-while cycle, creates the AST element of the DoWhileCycleStmt and returns it

Returns: DoWhileCycleStmt

Definition at line 257 of file parser.cpp.

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◆ parse_equality_expr()

AST::ExprPtr Parser::parse_equality_expr ( )

private

Method for parsing expression as 'equality'.

This method parsing all expressions as 'equality'. If type of current token isnt TOK_OP_EQ_EQ (aka ==) or TOK_OP_NOT_EQ_EQ (aka !=), then returns created expression

Returns: Parsed expression as 'equality'

Definition at line 380 of file parser.cpp.

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◆ parse_expr()

AST::ExprPtr Parser::parse_expr ( )

private

Method for parsing expressions.

This method parsing expression, creates the AST element and returns it

Returns: Parsed expression

Definition at line 358 of file parser.cpp.

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◆ parse_extern_stmt()

AST::StmtPtr Parser::parse_extern_stmt ( )

private

Method for parsing of declaration functions prototypes as extern.

This method sets the syntax for extern functions declaration, creates the AST element of the ExternStmt and returns it

Returns: ExternStmt

Definition at line 347 of file parser.cpp.

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◆ parse_for_cycle_stmt()

AST::StmtPtr Parser::parse_for_cycle_stmt ( )

private

Method for parsing of for cycle.

This method sets the syntax for for cycle, creates the AST element of the ForCycleStmt and returns it

Returns: ForCycleStmt

Definition at line 269 of file parser.cpp.

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◆ parse_func_call_stmt()

AST::StmtPtr Parser::parse_func_call_stmt ( )

private

Method for parsing of functions calling.

This method sets the syntax for calling a function, creates the AST element of the FuncCallStmt and returns it

Returns: FuncCallStmt

Definition at line 185 of file parser.cpp.

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◆ parse_func_decl_proto_stmt()

AST::StmtPtr Parser::parse_func_decl_proto_stmt ( )

private

Method for parsing of functions prototypes.

This method sets the syntax for function prototype declaration, creates the AST element of the FuncDeclStmt without body and returns it

Returns: FuncDeclStmt without body

Definition at line 320 of file parser.cpp.

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◆ parse_func_decl_stmt()

AST::StmtPtr Parser::parse_func_decl_stmt ( )

private

Method for parsing of functions declaration.

This method sets the syntax for defining a function, creates the AST element of the FuncDeclStmt and returns it

Returns: FuncDeclStmt

Definition at line 152 of file parser.cpp.

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◆ parse_if_else_stmt()

AST::StmtPtr Parser::parse_if_else_stmt ( )

private

Method for parsing of control flow operators (aka if-else).

This method sets the syntax for control flow operators, creates the AST element of the IfElseStmt and returns it

Returns: IfElseStmt

Definition at line 224 of file parser.cpp.

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◆ parse_l_and_expr()

AST::ExprPtr Parser::parse_l_and_expr ( )

private

Method for parsing expression as 'logical and'.

This method parsing all expressions as 'logical and'. If type of current token isnt TOK_OP_L_AND (aka &&), then returns created expression

Returns: Parsed expression as 'logical and'

Definition at line 362 of file parser.cpp.

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◆ parse_l_or_expr()

AST::ExprPtr Parser::parse_l_or_expr ( )

private

Method for parsing expression as 'logical or'.

This method parsing all expressions as 'logical or'. If type of current token isnt TOK_OP_L_OR (aka ||), then returns created expression

Returns: Parsed expression as 'logical or'

Definition at line 371 of file parser.cpp.

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◆ parse_module_stmt()

AST::StmtPtr Parser::parse_module_stmt ( )

private

Method for parsing of module definition.

This method sets the syntax for module definition, creates the AST element of the ModuleStmt and returns it

Returns: ModuleStmt

Definition at line 295 of file parser.cpp.

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◆ parse_multiplicative_expr()

AST::ExprPtr Parser::parse_multiplicative_expr ( )

private

Method for parsing expression as 'multiplicative'.

This method parsing all expressions as 'multiplicative'. If type of current token isnt TOK_OP_MULT (aka *) or TOK_OP_DIV (aka /) or TOK_OP_MODULO (aka %), then returns created expression

Returns: Parsed expression as 'multiplicative'

Definition at line 437 of file parser.cpp.

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◆ parse_obj_chain_expr()

AST::ExprPtr Parser::parse_obj_chain_expr ( )

private

Method for parsing expresion as chain of objects.

This method parsing all expressions as chain of objects. Elements of chain separated of '.' (for example: obj1.obj2)

Returns: Parsed expression as chain of objects

Definition at line 548 of file parser.cpp.

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◆ parse_primary_expr()

AST::ExprPtr Parser::parse_primary_expr ( )

private

Method for parsing expression as 'primary'.

This method parsing all expressions as 'primary'. If type of current token isnt literal or identifier, then throwing exception

Returns: Parsed expression as 'primary'

Definition at line 479 of file parser.cpp.

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◆ parse_return_stmt()

AST::StmtPtr Parser::parse_return_stmt ( )

private

Method for parsing of 'return'.

This method sets the syntax for 'return' statement, creates the AST element of the ReturnStmt and returns it

Returns: ReturnStmt

Definition at line 215 of file parser.cpp.

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◆ parse_stmt()

AST::StmtPtr Parser::parse_stmt ( bool from_for = false )

private

Method for parsing only one statement.

This method parsing one statement and returns it

Parameters

from_for Flag that indicates that the method is being called to process the for loop. If true, then processing for the for loop, otherwise not

Returns: Parsed statement

Definition at line 26 of file parser.cpp.

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◆ parse_unary_expr()

AST::ExprPtr Parser::parse_unary_expr ( )

private

Method for parsing expression as 'unary'.

This method parsing all expressions as 'unary'. If type of current token isnt TOK_OP_L_NOT (aka !) or TOK_OP_MINUS (aka -), then returns created expression

Returns: Parsed expression as 'unary'

Definition at line 457 of file parser.cpp.

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◆ parse_use_module_stmt()

AST::StmtPtr Parser::parse_use_module_stmt ( )

private

Method for parsing of import the module.

This method sets the syntax for import the module, creates the AST element of the UseModuleStmt and returns it

Returns: UseModuleStmt

Definition at line 309 of file parser.cpp.

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◆ parse_var_asgn_stmt()

AST::StmtPtr Parser::parse_var_asgn_stmt ( )

private

Method for parsing of variable assignment.

This method sets the syntax for assignment a variable, creates the AST element of the VarAsgnStmt and returns it

Returns: VarAsgnStmt

Definition at line 131 of file parser.cpp.

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◆ parse_var_decl_stmt()

AST::StmtPtr Parser::parse_var_decl_stmt ( )

private

Method for parsing of variable declaration.

This method sets the syntax for defining a variable, creates the AST element of the VarDeclStmt and returns it

Returns: VarDeclStmt

Definition at line 117 of file parser.cpp.

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◆ parse_while_cycle_stmt()

AST::StmtPtr Parser::parse_while_cycle_stmt ( )

private

Method for parsing of while cycle.

This method sets the syntax for while cycle, creates the AST element of the WhileCycleStmt and returns it

Returns: WhileCycleStmt

Definition at line 246 of file parser.cpp.

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◆ peek()

Token Parser::peek ( int32_t rpos = 0 ) const

private

Method for getting token from tokens by parser pos and passed offset.

This method getting getting token from tokens by parser pos and passed offset If pos + offset out of bounds of range tokens, then throwing exception

Parameters

rpos Offset

Returns: Token from tokens

Definition at line 576 of file parser.cpp.

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◆ reset()

void Parser::reset ( )

Method for resetting all parameters in parser.

Definition at line 20 of file parser.cpp.

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◆ ttype_to_tvalue()

AST::TypeValue Parser::ttype_to_tvalue ( TokenType type )

private

Method for convert type of token to type of Topaz value.

This method converts the passed token type to the Topaz value type. If the conversion fails, an exception is thrown

Parameters

type	Type of token for convertion

Returns: Converted type of Topaz value

Definition at line 648 of file parser.cpp.

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Member Data Documentation

◆ is_debug

bool Parser::is_debug

private

Flag for debug exception

Definition at line 19 of file parser.hpp.

◆ pos

uint32_t Parser::pos

private

Current position in tokens

Definition at line 18 of file parser.hpp.

◆ tokens

std::vector<Token> Parser::tokens

private

Tokens (from Lexer)

Definition at line 16 of file parser.hpp.

◆ tokens_count

size_t Parser::tokens_count

private

Count of tokens

Definition at line 17 of file parser.hpp.

The documentation for this class was generated from the following files:

/mnt/disk_ext4_0/topazlang/include/parser/parser.hpp
/mnt/disk_ext4_0/topazlang/src/parser/parser.cpp

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Parser()

Member Function Documentation

◆ consume()

◆ consume_semicolon()

◆ consume_type()

◆ create_compound_asgn_operator()

◆ create_inc_dec_operator()

◆ is_compound_asgn_operator()

◆ match()

◆ parse()

◆ parse_additive_expr()

◆ parse_argument()

◆ parse_break_stmt()

◆ parse_comparation_expr()

◆ parse_continue_stmt()

◆ parse_do_while_cycle_stmt()

◆ parse_equality_expr()

◆ parse_expr()

◆ parse_extern_stmt()

◆ parse_for_cycle_stmt()

◆ parse_func_call_stmt()

◆ parse_func_decl_proto_stmt()

◆ parse_func_decl_stmt()

◆ parse_if_else_stmt()

◆ parse_l_and_expr()

◆ parse_l_or_expr()

◆ parse_module_stmt()

◆ parse_multiplicative_expr()

◆ parse_obj_chain_expr()

◆ parse_primary_expr()

◆ parse_return_stmt()

◆ parse_stmt()

◆ parse_unary_expr()

◆ parse_use_module_stmt()

◆ parse_var_asgn_stmt()

◆ parse_var_decl_stmt()

◆ parse_while_cycle_stmt()

◆ peek()

◆ reset()

◆ ttype_to_tvalue()

Member Data Documentation

◆ is_debug

◆ pos

◆ tokens

◆ tokens_count