Support float numbers (#858)

bazelbuild · Jun 5, 2020 · bcd428a · bcd428a
1 parent a6c28d6
commit bcd428a
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Showing 6 changed files with 227 additions and 175 deletions.
diff --git a/build/lex.go b/build/lex.go
@@ -611,7 +611,7 @@ func (in *input) Lex(val *yySymType) int {
 		return _CONTINUE
 	}
 	if len(val.tok) > 0 && val.tok[0] >= '0' && val.tok[0] <= '9' {
-		return _NUMBER
+		return _INT
 	}
 	return _IDENT
 }

diff --git a/build/parse.y b/build/parse.y
@@ -81,7 +81,7 @@ package build
 %token	<pos>	_FOR     // keyword for
 %token	<pos>	_GE      // operator >=
 %token	<pos>	_IDENT   // non-keyword identifier
-%token	<pos>	_NUMBER  // number
+%token	<pos>	_INT     // integer number
 %token	<pos>	_IF      // keyword if
 %token	<pos>	_ELSE    // keyword else
 %token	<pos>	_ELIF    // keyword elif
@@ -924,7 +924,19 @@ ident:
 	}
 
 number:
-	_NUMBER
+	_INT '.' _INT
+	{
+		$$ = &LiteralExpr{Start: $1, Token: $<tok>1 + "." + $<tok>3}
+	}
+|	_INT '.'
+	{
+		$$ = &LiteralExpr{Start: $1, Token: $<tok>1 + "."}
+	}
+|	'.' _INT
+	{
+		$$ = &LiteralExpr{Start: $1, Token: "." + $<tok>2}
+	}
+|	_INT %prec ShiftInstead
 	{
 		$$ = &LiteralExpr{Start: $1, Token: $<tok>1}
 	}