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Implement the current set of rules for precedence partial ordering (#1096)

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In the process, switch to an unambiguous grammar, using the
precedence-climbing method for operator precedence (suitably modified to
handle a partial precedence order) rather than Bison %precedence /
%prec.
This commit is contained in:
Richard Smith
2022-03-03 13:36:35 -08:00
committed by GitHub
parent f5f02babdd
commit 8c60ad2e19
5 changed files with 328 additions and 97 deletions
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executable_semantics/testdata/basic_syntax/fail_missing_var.carbon
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@@ -7,7 +7,7 @@
// RUN: %{not} %{executable_semantics} --trace %s 2>&1 | \
// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes %s
// AUTOUPDATE: %{executable_semantics} %s
// CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/basic_syntax/fail_missing_var.carbon:16: syntax error, unexpected COLON
// CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/basic_syntax/fail_missing_var.carbon:16: syntax error, unexpected COLON, expecting EQUAL or SEMICOLON
package ExecutableSemanticsTest api;