diff options
Diffstat (limited to 'driver/parser_test.go')
| -rw-r--r-- | driver/parser_test.go | 106 |
1 files changed, 102 insertions, 4 deletions
diff --git a/driver/parser_test.go b/driver/parser_test.go index dfc2fe5..050e51a 100644 --- a/driver/parser_test.go +++ b/driver/parser_test.go @@ -322,10 +322,10 @@ fragment words: "[A-Za-z\u{0020}]+"; %name test list - : "\[" elems "]" #ast $2... + : "\[" elems "]" #ast elems... ; elems - : elems "," id #ast $1... $3 + : elems "," id #ast elems... id | id ; whitespace: "\u{0020}+" #skip; @@ -353,6 +353,39 @@ id: "[A-Za-z]+"; termNode("id", "Langly"), ), }, + // A label can be a parameter of #ast directive. + { + specSrc: ` +%name test + +%left add sub + +expr + : expr@lhs add expr@rhs #ast add lhs rhs + | expr@lhs sub expr@rhs #ast sub lhs rhs + | num + ; +add: '+'; +sub: '-'; +num: "0|[1-9][0-9]*"; +`, + src: `1+2-3`, + ast: nonTermNode("expr", + termNode("sub", "-"), + nonTermNode("expr", + termNode("add", "+"), + nonTermNode("expr", + termNode("num", "1"), + ), + nonTermNode("expr", + termNode("num", "2"), + ), + ), + nonTermNode("expr", + termNode("num", "3"), + ), + ), + }, // An ast action cannot be applied to a terminal symbol. { specSrc: ` @@ -362,7 +395,7 @@ s : foo ; foo - : "foo" #ast $1... + : "foo"@f #ast f... ; `, specErr: true, @@ -373,12 +406,77 @@ foo %name test s - : foo #ast $1... + : foo #ast foo... ; foo: "foo"; `, specErr: true, }, + // The expansion cannot be applied to a pattern. + { + specSrc: ` +%name test + +s + : foo "bar"@b #ast foo b... + ; +foo: "foo"; +`, + specErr: true, + }, + // The expansion cannot be applied to a string. + { + specSrc: ` +%name test + +s + : foo 'bar'@b #ast foo b... + ; +foo: "foo"; +`, + specErr: true, + }, + // A parameter of #ast directive must be either a symbol or a label in an alternative. + { + specSrc: ` +%name test + +s + : foo bar #ast foo x + ; +foo: "foo"; +bar: "bar"; +`, + specErr: true, + }, + // A symbol in a different alternative cannot be a parameter of #ast directive. + { + specSrc: ` +%name test + +s + : foo #ast bar + | bar + ; +foo: "foo"; +bar: "bar"; +`, + specErr: true, + }, + // A label in a different alternative cannot be a parameter of #ast directive. + { + specSrc: ` +%name test + +s + : foo #ast b + | bar@b + ; +foo: "foo"; +bar: "bar"; +`, + specErr: true, + }, // A production must not have a duplicate alternative. { specSrc: ` |