OpToken Class Reference

A token representing an operator in the high-level language. More...

#include <printlanguage.hh>

Public Types
enum	tokentype {   binary, unary_prefix, postsurround, presurround,   space }
	The possible types of operator token. More...

Public Member Functions
bool	parentheses (const OpToken &op2, int4 stage) const
	Determine if the given token should be emitted in its own parenthetic expression. More...

Public Attributes
const char *	print
	Printing characters for the token.
int4	stage
	Additional elements consumed from the RPN stack when emitting this token.
int4	precedence
	Precedence level of this token (higher binds more tightly)
bool	associative
	True if the operator is associative.
tokentype	type
	The basic token type.
int4	spacing
	Spaces to print around operator.
int4	bump
	Spaces to indent if we break here.
OpToken *	negate
	The token representing the negation of this token.

Detailed Description

A token representing an operator in the high-level language.

The token knows how to print itself and other syntax information like precedence level and associativity within the language, desired spacing, and how operator groups its input expressions. Note that an operator has a broader meaning than just p-code operators in this context.

Member Enumeration Documentation

tokentype

enum OpToken::tokentype

The possible types of operator token.

Enumerator
binary	Binary operator form (printed between its inputs)
unary_prefix	Unary operator form (printed before its input)
postsurround	Function or array operator form.
presurround	Modifier form (like a cast operation)
space	No explicitly printed token.

Member Function Documentation

parentheses()

bool OpToken::parentheses	(	const OpToken &	op2,
		int4	stage
	)		const

Determine if the given token should be emitted in its own parenthetic expression.

This token is being emitted. Check if its input expression, ending with the given operator token, needs to be surrounded by parentheses to convey the proper meaning.

Parameters

op2	is the input token to this operator
stage	is the stage of this operator currently being printed

Returns

true if op2 (as input to this) should be parenthesized

References associative, binary, postsurround, precedence, presurround, space, stage, type, and unary_prefix.

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

• printlanguage.hh
• printlanguage.cc