getValue: Get the literal value associated with a GCC node

In omegahat/RGCCTranslationUnit: R interface to GCC source code information

Description

This function and its methods allow us to query the value associated with a particular node in the translation unit. Often these are literals or constants.

Usage

getValue(node, defaultValue = NA, symbolic = FALSE)

Arguments

node	the translation unit node
defaultValue	if no value is available, return this value
symbolic	never used. The idea was (I think) to allow the value be returned symbolically as an expression if it were more than a literal, e.g. x + 1 or PI + 1

Value

An object!

Author(s)

Duncan Temple Lang

Examples

 tu = parseTU(system.file("examples", "value.cc.001t.tu", package = "RGCCTranslationUnit"))
 getValue(tu[[23]]) # 3.1415
 getValue(tu[[20]]) # pi - an identifier_node

 getValue(tu[[22]]) # y - variable declaration

 getValue(tu[[27]]) # -1

 getValue(tu[[3]]) # C routine name. foo

 getValue(tu[[39]]) # 'foo'
 getValue(tu[[67]]) # 'foo bar chicken    '

omegahat/RGCCTranslationUnit documentation built on May 24, 2019, 1:53 p.m.