aboutsummaryrefslogtreecommitdiff
path: root/tests/unit/driver/parser/conflict_test.go
diff options
context:
space:
mode:
Diffstat (limited to 'tests/unit/driver/parser/conflict_test.go')
-rw-r--r--tests/unit/driver/parser/conflict_test.go524
1 files changed, 0 insertions, 524 deletions
diff --git a/tests/unit/driver/parser/conflict_test.go b/tests/unit/driver/parser/conflict_test.go
deleted file mode 100644
index 0bc14d4..0000000
--- a/tests/unit/driver/parser/conflict_test.go
+++ /dev/null
@@ -1,524 +0,0 @@
-package parser
-
-import (
- "strings"
- "testing"
-
- "urubu/grammar"
- "urubu/spec/grammar/parser"
-)
-
-func TestParserWithConflicts(t *testing.T) {
- tests := []struct {
- caption string
- specSrc string
- src string
- cst *Node
- }{
- {
- caption: "when a shift/reduce conflict occurred, we prioritize the shift action",
- specSrc: `
-#name test;
-
-expr
- : expr assign expr
- | id
- ;
-
-id: "[A-Za-z0-9_]+";
-assign: '=';
-`,
- src: `foo=bar=baz`,
- cst: nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "foo"),
- ),
- termNode("assign", "="),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "bar"),
- ),
- termNode("assign", "="),
- nonTermNode("expr",
- termNode("id", "baz"),
- ),
- ),
- ),
- },
- {
- caption: "when a reduce/reduce conflict occurred, we prioritize the production defined earlier in the grammar",
- specSrc: `
-#name test;
-
-s
- : a
- | b
- ;
-a
- : id
- ;
-b
- : id
- ;
-
-id: "[A-Za-z0-9_]+";
-`,
- src: `foo`,
- cst: nonTermNode("s",
- nonTermNode("a",
- termNode("id", "foo"),
- ),
- ),
- },
- {
- caption: "left associativities defined earlier in the grammar have higher precedence",
- specSrc: `
-#name test;
-
-#prec (
- #left mul
- #left add
-);
-
-expr
- : expr add expr
- | expr mul expr
- | id
- ;
-
-id: "[A-Za-z0-9_]+";
-add: '+';
-mul: '*';
-`,
- src: `a+b*c*d+e`,
- cst: nonTermNode("expr",
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "a"),
- ),
- termNode("add", "+"),
- nonTermNode("expr",
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "b"),
- ),
- termNode("mul", "*"),
- nonTermNode("expr",
- termNode("id", "c"),
- ),
- ),
- termNode("mul", "*"),
- nonTermNode("expr",
- termNode("id", "d"),
- ),
- ),
- ),
- termNode("add", "+"),
- nonTermNode("expr",
- termNode("id", "e"),
- ),
- ),
- },
- {
- caption: "left associativities defined in the same line have the same precedence",
- specSrc: `
-#name test;
-
-#prec (
- #left add sub
-);
-
-expr
- : expr add expr
- | expr sub expr
- | id
- ;
-
-id: "[A-Za-z0-9_]+";
-add: '+';
-sub: '-';
-`,
- src: `a-b+c+d-e`,
- cst: nonTermNode("expr",
- nonTermNode("expr",
- nonTermNode("expr",
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "a"),
- ),
- termNode("sub", "-"),
- nonTermNode("expr",
- termNode("id", "b"),
- ),
- ),
- termNode("add", "+"),
- nonTermNode("expr",
- termNode("id", "c"),
- ),
- ),
- termNode("add", "+"),
- nonTermNode("expr",
- termNode("id", "d"),
- ),
- ),
- termNode("sub", "-"),
- nonTermNode("expr",
- termNode("id", "e"),
- ),
- ),
- },
- {
- caption: "right associativities defined earlier in the grammar have higher precedence",
- specSrc: `
-#name test;
-
-#prec (
- #right r1
- #right r2
-);
-
-expr
- : expr r2 expr
- | expr r1 expr
- | id
- ;
-
-whitespaces #skip
- : "[\u{0009}\u{0020}]+";
-r1
- : 'r1';
-r2
- : 'r2';
-id
- : "[A-Za-z0-9_]+";
-`,
- src: `a r2 b r1 c r1 d r2 e`,
- cst: nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "a"),
- ),
- termNode("r2", "r2"),
- nonTermNode("expr",
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "b"),
- ),
- termNode("r1", "r1"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "c"),
- ),
- termNode("r1", "r1"),
- nonTermNode("expr",
- termNode("id", "d"),
- ),
- ),
- ),
- termNode("r2", "r2"),
- nonTermNode("expr",
- termNode("id", "e"),
- ),
- ),
- ),
- },
- {
- caption: "right associativities defined in the same line have the same precedence",
- specSrc: `
-#name test;
-
-#prec (
- #right r1 r2
-);
-
-expr
- : expr r2 expr
- | expr r1 expr
- | id
- ;
-
-whitespaces #skip
- : "[\u{0009}\u{0020}]+";
-r1
- : 'r1';
-r2
- : 'r2';
-id
- : "[A-Za-z0-9_]+";
-`,
- src: `a r2 b r1 c r1 d r2 e`,
- cst: nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "a"),
- ),
- termNode("r2", "r2"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "b"),
- ),
- termNode("r1", "r1"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "c"),
- ),
- termNode("r1", "r1"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "d"),
- ),
- termNode("r2", "r2"),
- nonTermNode("expr",
- termNode("id", "e"),
- ),
- ),
- ),
- ),
- ),
- },
- {
- caption: "terminal symbols with an #assign directive defined earlier in the grammar have higher precedence",
- specSrc: `
-#name test;
-
-#prec (
- #assign a1
- #assign a2
-);
-
-expr
- : expr a2 expr
- | expr a1 expr
- | id
- ;
-
-whitespaces #skip
- : "[\u{0009}\u{0020}]+";
-a1
- : 'a1';
-a2
- : 'a2';
-id
- : "[A-Za-z0-9_]+";
-`,
- src: `a a2 b a1 c a1 d a2 e`,
- cst: nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "a"),
- ),
- termNode("a2", "a2"),
- nonTermNode("expr",
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "b"),
- ),
- termNode("a1", "a1"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "c"),
- ),
- termNode("a1", "a1"),
- nonTermNode("expr",
- termNode("id", "d"),
- ),
- ),
- ),
- termNode("a2", "a2"),
- nonTermNode("expr",
- termNode("id", "e"),
- ),
- ),
- ),
- },
- {
- caption: "terminal symbols with an #assign directive defined in the same line have the same precedence",
- specSrc: `
-#name test;
-
-#prec (
- #assign a1 a2
-);
-
-expr
- : expr a2 expr
- | expr a1 expr
- | id
- ;
-
-whitespaces #skip
- : "[\u{0009}\u{0020}]+";
-a1
- : 'a1';
-a2
- : 'a2';
-id
- : "[A-Za-z0-9_]+";
-`,
- src: `a a2 b a1 c a1 d a2 e`,
- cst: nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "a"),
- ),
- termNode("a2", "a2"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "b"),
- ),
- termNode("a1", "a1"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "c"),
- ),
- termNode("a1", "a1"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "d"),
- ),
- termNode("a2", "a2"),
- nonTermNode("expr",
- termNode("id", "e"),
- ),
- ),
- ),
- ),
- ),
- },
- {
- caption: "#left, #right, and #assign can be mixed",
- specSrc: `
-#name test;
-
-#prec (
- #left mul div
- #left add sub
- #assign else
- #assign then
- #right assign
-);
-
-expr
- : expr add expr
- | expr sub expr
- | expr mul expr
- | expr div expr
- | expr assign expr
- | if expr then expr
- | if expr then expr else expr
- | id
- ;
-
-ws #skip: "[\u{0009}\u{0020}]+";
-if: 'if';
-then: 'then';
-else: 'else';
-id: "[A-Za-z0-9_]+";
-add: '+';
-sub: '-';
-mul: '*';
-div: '/';
-assign: '=';
-`,
- src: `x = y = a + b * c - d / e + if f then if g then h else i`,
- cst: nonTermNode(
- "expr",
- nonTermNode("expr",
- termNode("id", "x"),
- ),
- termNode("assign", "="),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "y"),
- ),
- termNode("assign", "="),
- nonTermNode("expr",
- nonTermNode("expr",
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "a"),
- ),
- termNode("add", "+"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "b"),
- ),
- termNode("mul", "*"),
- nonTermNode("expr",
- termNode("id", "c"),
- ),
- ),
- ),
- termNode("sub", "-"),
- nonTermNode("expr",
- nonTermNode("expr",
- termNode("id", "d"),
- ),
- termNode("div", "/"),
- nonTermNode("expr",
- termNode("id", "e"),
- ),
- ),
- ),
- termNode("add", "+"),
- nonTermNode("expr",
- termNode("if", "if"),
- nonTermNode("expr",
- termNode("id", "f"),
- ),
- termNode("then", "then"),
- nonTermNode("expr",
- termNode("if", "if"),
- nonTermNode("expr",
- termNode("id", "g"),
- ),
- termNode("then", "then"),
- nonTermNode("expr",
- termNode("id", "h"),
- ),
- termNode("else", "else"),
- nonTermNode("expr",
- termNode("id", "i"),
- ),
- ),
- ),
- ),
- ),
- ),
- },
- }
-
- for _, tt := range tests {
- t.Run(tt.caption, func(t *testing.T) {
- ast, err := parser.Parse(strings.NewReader(tt.specSrc))
- if err != nil {
- t.Fatal(err)
- }
-
- b := grammar.GrammarBuilder{
- AST: ast,
- }
- cg, _, err := b.Build()
- if err != nil {
- t.Fatal(err)
- }
-
- toks, err := NewTokenStream(cg, strings.NewReader(tt.src))
- if err != nil {
- t.Fatal(err)
- }
-
- gram := NewGrammar(cg)
- tb := NewDefaultSyntaxTreeBuilder()
- p, err := NewParser(toks, gram, SemanticAction(NewCSTActionSet(gram, tb)))
- if err != nil {
- t.Fatal(err)
- }
-
- err = p.Parse()
- if err != nil {
- t.Fatal(err)
- }
-
- if tt.cst != nil {
- testTree(t, tb.Tree(), tt.cst)
- }
- })
- }
-}
generated by cgit v1.2.3 (git 2.49.0) at 2025-07-12 15:21:56 +0000